8e79ade49d
Also, update the unit tests that were checking for SIGSEGV to not check for a specific signal. To further improve this check, it may be worth: - renaming the configuration option/macro/docs to be clearer about intent. - swap __builtin_trap for __builtin_unreachable, removing the preprocessor variants of LIBC_CRASH_ON_NULLPTR, then unconditionally using `-fsanitize=unreachable -fsanitize-trap=unreachable` in cmake flags when LIBC_ADD_NULL_CHECKS is enabled. - building with `-fno-delete-null-pointer-checks` when LIBC_ADD_NULL_CHECKS (or when some larger yet to be added hardening config) is enabled. Link: #111546
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